R5F72115D160FPV datasheet(962/1228 Pages) RENESAS

962 / 1228 page

Section 21 Flash Memory

Rev. 2.00 May. 08, 2008 Page 938 of 1200

REJ09B0344-0200

(3)

User MAT Erasing in User Boot Mode

For erasing the user MAT in user boot mode, additional processings made by setting FMATS

are required: switching from user-boot-MAT selection state to user-MAT selection state, and

switching back to user-boot-MAT selection state after erasing completes.

Figure 21.15 shows the procedure for erasing the user MAT in user boot mode.

Start erasing

procedure program

Select on-chip program

to be downloaded and

set download destination

by FTDAR

Set FKEY to H'A5

DPFR=0 ?

Yes

Download error processing

Set the FPEFEQ and

FUBRA parameters

Initialization

JSR FTDAR setting+32

Yes

End erasing

procedure program

FPFR=0 ?

Initialization error processing

Clear FKEY to 0

Set FEBS parameter

Programming

JSR

FTDAR setting+16

Yes

FPFR=0 ?

Clear FKEY and erasing

error processing*

Yes

Required

block erasing is

completed?

Set FKEY to H'5A

Clear FKEY to 0

Set FMATS to value other

than H'AA to select user MAT

After clearing VBR,

set SCO to 1 and

execute download

Set FMATS to H'AA to

select user boot MAT

User-boot-MAT

selection state

Note: * The MAT must be switched by FMATS to perform the

erasing error processing in the user boot MAT.

MAT

switchover

MAT

switchover

Figure 21.15 Procedure for Erasing User MAT in User Boot Mode

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